(HealthDay News) -- Most cases of bedwetting aren't something to worry about, experts say, but occasionally they can represent a medical problem.

The Nemours Foundation says you should call a pediatrician about bedwetting if:

• It suddenly occurs after six months of dry nights.
• A child wets his/her pants during the day.
• Behavioral problems start suddenly at home or school.
• The child needs to urinate frequently, or complains of burning or pain during urination.
• The child suddenly has increased appetite or increased thirst.
• Swelling suddenly develops near the ankles or feet.
• Bedwetting persists after the child's seventh birthday.